Al, I had the same experience with the Nino TNC except it used multiple LEDs of different colors and at night it lit up my house like a disco.? Even worse, the LEDs used a resistor array so I couldn't easily solder in higher value resistors. In the end I added a switch on the array's ground to turn it off if I wasn't troubleshooting the radio's link.?
If Hans doesn't get around to it, add a potentiometer or resistor in series to your LED.
Joshua?
Joshua KJ7LVZ